Design and application of a magnetic field gradient electrode

  • Chaure N
  • Rhen F
  • Hilton J
 et al. 
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A platinum coated electrode, which creates a magnetic field of 25 mT and a field gradient of order 105T m-1within 100 nm of the electrode surface is produced by embedding an array of CoPt nanowires in an alumina membrane. There is an enhancement by up to a factor of three for a model oxygen reduction reaction in an alkaline medium when the nanowires in the electrode are in a magnetized state. We suggest that the enhancement of the oxygen reduction current is associated with an increase of concentration of HO2-on the surface of the electrode by the magnetic field gradient. © 2006 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • CoPt
  • Magnetic field gradient
  • Oxygen reduction

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